<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>Document</title>
<script type="text/javascript">
	
var arr=[1,56,23,6,43,87,3,5,55];
	function maxnum(arr){
		var index=0;
		for (var i in arr) {
		if(arr[index]<arr[i]){
			index=i;
		}
	}
	return index;
}
	document.write(arr[maxnum(arr)]);
</script>


</script>
</head>
<body>
	
</body>
</html>